<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div class="reference"
     style="width:100%;display:none;height:100%;background: rgba(0, 0, 0, 0.21);top:0;left:0;bottom:0;right:0;
  position: absolute;z-index: 1000;justify-content: center; align-items: center;">
  <img class="rf_menu" src="images/rf_menu.png">
  <img class="rf_onlineDevice" src="images/rf_onlineDevice.png"/>
  <img class="rf_state_bar" src="images/rf_state_bar.png"/>
  <img class="rf_todayTask" src="images/rf_todayTask.png"/>
</div>
</body>
</html>
